pub fn bit_unpack(data: &[u8], a: u32, b: u32, w: &mut [i32; 256])Expand description
Unpack a polynomial whose coefficients lie in [-a, b].
Implements Algorithm 19 of FIPS 204 (BitUnpack). Inverse of bit_pack.
data: packed byte data.a: magnitude of the negative bound.b: positive bound.w: output polynomial (filled with decoded coefficients in [-a, b]).